急问：在线，各位高手看看这是什么原因啊？

[Anrylxp]

Control 'calendar1' of type 'Calendar' must be placed inside a form tag with runat=server.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Control 'calendar1' of type 'Calendar' must be placed inside a form tag with runat=server.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

<%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:


[HttpException (0x80004005): Control 'calendar1' of type 'Calendar' must be placed inside a form tag with runat=server.]
System.Web.UI.Page.VerifyRenderingInServerForm(Control control) +151
System.Web.UI.WebControls.Calendar.Render(HtmlTextWriter writer) +184
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +243
ASP.default_aspx.__Render__control1(HtmlTextWriter __output, Control parameterContainer) +68
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +27
System.Web.UI.Control.Render(HtmlTextWriter writer) +7
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +243
System.Web.UI.Page.ProcessRequestMain() +1929


修改后又出现了这样的错误呀！
思归大哥
又要麻烦你了！

[wenww]

'Calendar'

[manbaum]

Control 'calendar1' of type 'Calendar' must be placed inside a form tag with runat=server.

不是说的很清楚了么？

[manbaum]

类型为 'Calendar' 的控件 'calendar1' 必须放在设置了 runat=server 的 form 标签里。